CN1189017C - Device, and method and record media for processing information - Google Patents

Device, and method and record media for processing information Download PDF

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Publication number
CN1189017C
CN1189017C CNB011221909A CN01122190A CN1189017C CN 1189017 C CN1189017 C CN 1189017C CN B011221909 A CNB011221909 A CN B011221909A CN 01122190 A CN01122190 A CN 01122190A CN 1189017 C CN1189017 C CN 1189017C
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stream
bit rate
video
coding
class
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CN1338870A (en
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加藤元树
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Sony Corp
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Sony Corp
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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Mathematical Analysis (AREA)
  • Algebra (AREA)
  • General Physics & Mathematics (AREA)
  • Physics & Mathematics (AREA)
  • Mathematical Optimization (AREA)
  • Pure & Applied Mathematics (AREA)
  • Compression Or Coding Systems Of Tv Signals (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)
  • Television Signal Processing For Recording (AREA)
  • Television Systems (AREA)

Abstract

When the bit rate of an input transport stream is reduced to a lower bit rate S by reencoding, the bit rate Ro of streams other than video is set to be the same as the bit rate of the streams other than video in the input transport stream. Then, the value obtained by subtracting Ro from S (S-Ro) is set as the bit rate for the video stream to be reencoded.

Description

The apparatus and method that are used for information processing
Technical field
The present invention relates to be used for the apparatus and method of information processing, and recording medium, and be particularly related to be used for can be more effectively to the video data apparatus and method handled of information encoded again, and recording medium.
Background technology
DVB (Digital Video Broadcast as Europe, be digital video broadcasting), DTV (the Digital Television of the U.S., be Digital Television) broadcasting and Japanese BS (BroadcastSatellite, be broadcasting satellite) the such digital television broadcasting of digital broadcasting, MPEG (Moving Picture Expert Group, promptly mobile motion picture expert group version) 2 transport stream have been used.This transport stream is formed by a series of transmission package, and transmission package is the video data or the voice data of for example packing, and the data length of single transmission package is 188 bytes.
Digital television broadcasting is different from analog television broadcast, and wherein digital television broadcasting can provide service with the multimedia coding data.This service gets in touch video data, voice data, letter and graph data, Still image data and other data by the multimedia coding data each other, and the transmission data.For example, under the situation of the BS of Japan digital broadcasting, the coding method based on XML (Extensible MarkupLanguage, i.e. extending mark language) is used for the multimedia coding data.Be used for the ARIB STD-B24 digital coding and the transmission specification of for example digital broadcasting, disclosing the details of this method.
Video data, voice data, letter and graph data, Still image data and other data transmit as transmission package.
In digital television broadcasting, if, when receiver side, be recorded as the streamed TV programme of so-called transmission, so can recording television programs and its picture quality and sound quality are descended.Yet in some cases, people require on the recording medium of limited recording capacity, and the TV programme that record is long as far as possible is even for example its picture quality a bit descends.Under these circumstances, for example can encode again and reduce its bit rate video flowing.
Under these circumstances, the bit rate of video flowing and other stream can reduce with identical speed.
For example, when the bit rate of input transport stream is reduced to 1/2 when being used to export, the bit rate of video flowing is reduced to 1/2, and the bit rate of the stream beyond the same video flowing also is reduced to 1/2.As a result, the bit rate of the stream beyond the video flowing has relatively low data capacity, and especially, for example audio stream is greatly influenced, and this causes sound quality to descend significantly.
Summary of the invention
The objective of the invention is to prevent that the outflow beyond the video flowing from now obviously descending.
To achieve these goals, according to a first aspect of the invention, a kind of information processor is provided, be used for the input multiplex stream is encoded again, the output multiplex stream is provided, comprise: separator, be used for being separated into described input multiplex stream first-class and second stream, wherein second stream is formed by the stream beyond first-class; Setting device is used to be provided with the bit rate of described output multiplex stream; Control device is used for according to the bit rate of described second stream and the bit rate of described output multiplex stream, and control adjustment is used for the described first-class encoding condition of coding again; Code device is used under described encoding condition described first-class coding again; With, multiplex machine is used for described first-class and described second stream of encoding again multiplexed.
With this structure, first-class is video flowing, and the difference between the position of the bit rate that control device can be by being provided with the output multiplex stream and second stream, controls encoding condition, when encoding again to the bit rate of first-class distribution.
Encoding condition can comprise at least or first bit rate, perhaps frame of video when encoding again.
Control device also can be according to first stream information control encoding condition, wherein first-class being included in the input multiplex stream.
To achieve these goals, according to a second aspect of the invention, a kind of information processing method is provided, be used for the input multiplex stream is encoded again, the output multiplex stream is provided thus, comprise step: be separated into described input multiplex stream first-class and second stream, wherein second stream is formed by the stream beyond first-class; The bit rate of described output multiplex stream is set; According to the bit rate of described second stream and the bit rate of described output multiplex stream, control adjustment is used for the described first-class encoding condition of coding again; Under described encoding condition to described first-class again the coding; And, described first-class and described second stream of encoding again is multiplexed.
To achieve these goals, according to a third aspect of the invention we, provide the program on the recording medium, comprised step: will import multiplex stream and be separated into first-class and second stream, wherein second stream is formed by the stream beyond first-class; The bit rate of output multiplex stream is set; According to the bit rate of second stream and the Bit-Rate Control Algorithm encoding condition of output multiplex stream, be used for first-class coding again; Under encoding condition, encode again to first-class; And first-class and second stream that will encode again is multiplexed.
With this structure, according to the apparatus and method that are used for information processing of the present invention, and the program on the recording medium, can be used for first-class coding again according to the stream information of second stream and the Bit-Rate Control Algorithm encoding condition of output multiplex stream.
Description of drawings
Fig. 1 is a structure chart, has shown the embodiment that uses tape deck of the present invention;
Fig. 2 A and 2B are the figure that helps the multiplexer operation in the key-drawing 1;
Fig. 3 A, 3B and 3C help the figure that mark adding time of advent device is handled in the key-drawing 1;
Fig. 4 is the figure that helps to explain the sub-information of multimedia display;
Fig. 5 is the figure that helps to explain the input transport stream;
Fig. 6 has shown the transport stream after the video flowing of Fig. 5 encoded again;
Fig. 7 is a flow chart, helps the recording device records rate controlled process of key-drawing 1;
Fig. 8 is a flow chart, helps another recording rate control procedure of key-drawing 1 tape deck;
Fig. 9 has shown another transport stream after video flowing encoded again;
Figure 10 has shown another input transport stream;
Figure 11 is a structure chart, has shown the embodiment that uses reproducer of the present invention;
Figure 12 A and 12B are the figure that helps to explain the display screen when the sub-information of multimedia display is added into;
Figure 13 has shown another structure of using tape deck of the present invention;
Figure 14 has shown another structure of using reproducer of the present invention; And
Figure 15 is the figure that helps to explain a kind of medium.
Embodiment
Below with reference to diagram the preferred embodiments of the present invention are described.Fig. 1 is a structure chart, has shown the embodiment that uses tape deck 1 of the present invention.The transport stream that is received by antenna or similar parts (not shown) is imported into selector 10.Selector 10 is also imported by the program number (channel number) of user from a terminal appointment from antenna 11.Selector 10 extracts specific program, then the output transport stream according to program number from the input transport stream.The part transport stream is imported into demultiplexer 12 and analytic unit 13.
The transport stream that is input to demultiplexer 12 is separated into video flowing and other stream (stream comprises audio frequency, rest image, letter and graph data, multimedia coding data and other data).The video flowing that separates is output to decoder 14.Other stream is output to multiplexer 16.Demultiplexer 12 is not only with the transmission package beyond the video, and the output time information that will import transmission package in the transport stream outputs to multiplexer 16.
Decoder 14 is by specific coding/decoding method, and MPEG2 method for example with the decoding video stream of input, outputs to encoder 15 with video data as a result then.Equally, decoder 14 outputs to coding controller 18 with the stream information of the video flowing that obtains in the decoding processing.
Simultaneously, analytic unit 13 obtains stream information by the transport stream of analyzing input, and for example bitrate information of the stream beyond the video or the like outputs to stream information coding controller 18 then.Coding controller 18 provides the stream information of the stream beyond the video, and wherein the stream beyond the video is from analytic unit 13 outputs; Video stream information from decoder 14 outputs; Stream record bitrate information with terminal 19.Coding controller 18 uses these data fragments that condition is set, and is used for the coding by 15 pairs of video datas of encoder, then the condition (coding control information) that is provided with is outputed to encoder 15 and coding unit 20.
For example by write down the bit rate (data of slave controller input from stream, do not draw, be used for operation by terminal 19 controlling recording devices 1) deduct the bit rate total value (from the data of analytic unit 13 inputs) of the stream beyond the video, coding controller 18 is provided with the value that obtains, as the bit rate that video data encoding is distributed.Coding controller 18 is provided with bit rate, frame of video and other coding control information, and the picture quality that is optimized at the bit rate that is provided with, the coding control information that will be provided with then outputs to encoder 15 and coding unit 20.The coding control information will specifically describe with reference to figure 5 to 10 in the back.
By the way, when with fixed rate during at the enterprising line item of recording medium, stream record bit rate is a fixed rate, and when write down with variable bit rate, it is the mean bit rate of each scheduled time that stream writes down bit rate.Yet the maximum of variable bit rate is necessary not to be higher than the dominant record bit rate that recording medium guarantees in this case.
Encoder 15 is according to the coding control information (for example passing through the MPEG2 method to video data encoding) from coding controller 18 outputs, video data encoding to decoder 14 outputs, and result data is outputed to multiplexer 16, multiplexer 16 provides video flowing from encoder 15, provide the information of the transport stream packets due in of transport stream packets beyond the video and demultiplexer 12 equally.Multiplexer 16 is according to due in information, and the transport stream packets beyond video flowing and the video is multiplexed, then the result is outputed to mark adding time of advent device 17, as transport stream.
Fig. 2 A and 2B have schematically illustrated this processing of being carried out by multiplexer 16.Fig. 2 A has illustrated the moment of input transport stream packets.In Fig. 2 A, grey color part is represented video packets, and white portion is represented video stream bag in addition.Shown in Fig. 2 A, the transport stream packets of input is continuous.15 pairs of video datas of encoder are encoded again, reduce the amount of video data thus.As a result, reduce the quantity of video packets.
Shown in Fig. 2 B, multiplexer 16 does not change the stream moment beyond the video, and only changes the moment of video packets from reset condition (state shown in Fig. 2 A).
Shown in Fig. 3 A, 3B and 3C, mark adding time of advent device 17 will comprise the head that arrives time mark, dose in each transport stream packets of importing transport stream (Fig. 3 A), thus generation source bag (Fig. 3 B).The time of advent, mark added device 17 arrangement source bag (Fig. 3 C) in a continuous manner, then the source bag was outputed to writing unit 21.The time of advent, mark was the information of the transport stream packets due in the indication transport stream.Writing unit 21 wraps stream with the source and becomes file, then the source is wrapped stream and records on the recording medium 22, and wherein bag stream in source is formed by the bag of continuous input.By the way, any medium can be used as recording medium 22.
Writing unit 21 also provides from the information of coding unit 20 outputs.Coding unit 20 produces the sub-information of multimedia display according to the coded video information of coding controller 18, then multimedia display letter is outputed to writing unit 21.When decoding (is decoded by decoder 14, after this encode again by encoder 15) video flowing when having changed the size of frame of video, output to the sub-information of multimedia display of writing unit 21, on the multimedia plane,, be set to and transmit the identical of side setting video display position and display size.The sub-information of multimedia display is used for the reproduction with the multimedia coding data aggregate.
Specific description is made up of the sub-information of multimedia display.As shown in Figure 4, the sub-information of multimedia display comprises three marks: the mark that do not match (mismatch_MMinfo_flag), coded markings (Re_encoded_flag) and change frame size mark (changed_frame_size_flag) again; Two sizes of data indication: original level size (original_horizontal_size) and original vertical size (original-vertical-size); With original display scale ratio (original-display_aspect_ratio).
Do not match and whether do not match between mark instruction video and the multimedia coding data.Whether the coded markings instruction video encodes in record more again.Whether change frame size mark instruction video frame by for example coding change again.The original level size is the frame of video size of horizontal direction before encoding again.The original vertical size is the frame of video size of vertical direction before encoding again.The original display scale ratio indication preceding frame of coding again shows scale ratio.
The sub-information of above-described multimedia display is example, can comprise that Fig. 4 shows information in addition, and perhaps the partial information of Fig. 4 demonstration can be removed as required.
The sub-information of multimedia display by coding unit 20 is set up and exported is recorded on the recording medium 22 by writing unit 21.The sub-information of multimedia display is as the file logging that separates with source bag stream file, and wherein bag stream file in source is from 17 outputs of mark adding time of advent device.Sub-information is recorded on the recording medium 22 with multimedia display when writing unit 21, as with file that bag stream file in source separates the time, and the sub-information of multimedia display of coding unit 20 outputs becoming file.
In the superincumbent description, coding controller 18 produces the coding control information according to the data of input, comprises bit rate, frame of video and out of Memory.Yet, the information of back can be used as other coding control information and produces: the transport stream of analyzing input when analytic unit 13, and when determining that thus the input transport stream comprises the multimedia coding data, coding controller 18 can produce the coding control information, be used to indicate 15 pairs of frame of video of encoder to encode again, and the control information of will encoding output to encoder 15 with original video frame (frame of video before the coding again) same size.
Under these circumstances, video encoder 15, is encoded the video data of decoder 14 on the value identical with the frame of video of original video stream according to the input coding control information again.When producing such coding control information, and control information is carried out when encoding again according to coding, and frame of video is not changed by coding again, can prevent the video flowing of encoding and obtaining and not matching between the multimedia coding data thus.
Example according to the coding control information will be described below to 10 with reference to figure 5.
As shown in Figure 5, suppose that the transport stream that is input to selector 10 has fixing bit rate, the stream beyond the RI for example, video flowing and video is all with variable bit rate coding.Under the situation of Fig. 5, the bit rate of video flowing is RVA at unit interval (for example GOP) A, and the bit rate of the stream beyond the video is ROA in the unit interval, and at unit interval B, the bit rate of video flowing is RVB, and the bit rate of the stream beyond the video is ROB.At unit interval C, the bit rate of video flowing is RVC, and the bit rate of the stream beyond the video is ROC.
When transport stream shown in Figure 5 will be encoded again, and from multiplexer 16 outputs, as shown in Figure 6, when having the transport stream of fixed bit rate S, the processing of the flowchart text of coding controller 18 execution graphs 7.
At first, at step S1, coding controller 18 is according to from terminal 19, by the control signal of unillustrated controller input among the figure, at S the bit rate (recording rate) of transport stream is set, and wherein transport stream will be from multiplexer 16 outputs.Below, at step S2, the stream beyond the video that coding controller 18 is determined to be recorded, and the maximum D of the gross bit rate of calculating stream.
Determine maximum D from the stream standard of input transport stream.For example, according to the standard of the stream of the digital BS of Japan broadcasting, the maximum of the bit rate of single audio frequency stream is 384kbps, and like this when recorded video stream not only, and when writing down two audio streams, maximum D is 384 * 2kbps.
Below, at step S3, coding controller 18 deducts the maximum D that step S2 calculates from the record bit rate S that step S1 is provided with, be provided with then the value C that obtains (=S-D), as the bit rate that the video data of coding is again distributed.At step S4, coding controller 18 is analyzed bit rate, frame of video and other coded message of video flowing by the Video stream information of reference decoder 14 outputs.
Step S5 below, coding controller 18 is determined video coding parameters (video coding control information), comes the coded message of the video flowing that the value C that calculates according to step S3 and step S4 analyze, the picture quality that is optimized.
In example shown in Figure 6, value S is 1/2 of value RI.In this case, the bit rate of the stream beyond the video has maximum D, and when its during as the bit rate of the stream beyond the video of coding back multiplex stream again, use maximum D.
Then, determine video coding parameter, and the picture quality that in the scope of (S-D), is optimized.When the control of video frame, the frame of video of 720 * 480 pixels secondary sample in the horizontal direction for example, and pixel is reduced to 1/2, i.e. 360 * 480 pixels.The coding parameter of determining (bit rate, frame of video or the like) is provided for encoder 15, as the video coding control information.
At step S6, the video coding control information that encoder 15 provides according to coding controller 18 is encoded the video data of handling on the unit interval (being unit interval A in this case) again.In the example of Fig. 6, although in fact the bit rate ROA of unit interval A is lower than maximum D, because maximum D is a fixed value, the bit rate of distributing to video is (S-D).Because maximum D fixes, and has the part Rsa of a waste can not be used for video coding.Filler is inserted among the part Rsa.
At step S7, coding controller 18 determines whether the stream that will be encoded again finishes.When stream did not also finish, processing turned back to step S4 and repeats the downward process from step S4.
Determine at step S7 that when coding controller 18 when the stream that will be encoded again finished, processing finished.
Like this, same unit interval B in Fig. 6 example, the bit rate of the stream beyond the video is D, and the bit rate of distributing to video flowing is a fixed bit rate, i.e. S-D.Filler is inserted into corresponding to value Rsb (in the part of=S-(S-D)-ROB=D-ROB).
Equally on unit interval C, the bit rate of the stream beyond the video is D, and the bit rate of distributing to video flowing is S-D.In unit interval C, D=ROC does not have filler like this.
Like this, in the example of Fig. 6, video flowing is encoded with fixed bit rate.
Fig. 8 has illustrated the processing when distributing to video encoded bit rate is variable bit rate again.At first, at step S21, coding controller 18 is provided with record bit rate S according to the input from terminal 19.Step S22 below, coding controller 18 analyze the coded message of video flowing according to the Video stream information from decoder 14 outputs.Step S1 among the processing of step S21 and S22 and Fig. 7 and S4's is identical.
Step S23 below, coding controller 18 calculate the gross bit rate B of video stream time per unit in addition from the output of analytic unit 13.
Step S24 below, coding controller 18 deduct the value B that the processing of step S23 is calculated from the value S that step S21 is provided with, be provided with then the value C that obtains (=S-B), as to the video bit rate of coding assignment again.
Then, at step S25, the value C that coding controller 18 obtains according to step S24 and analyze the result of video flowing coded message in step 22 determines video coding parameter, and the picture quality that is optimized.The coding parameter of determining outputs to encoder 15.
At step S26, the coding parameter that encoder 15 is determined according to the processing of step S25 is encoded to the video data of current unit interval again.Like this, as shown in Figure 9, for example Roa (=ROA) be retained, as the unit interval bit rate of video, be defined as the bit rate Rva of (S-Roa) then with outflow, be set to the bit rate of video flowing.
At step S27, coding controller 18 determines whether stream finishes.When stream does not finish, handle and turn back to step S22, and from the downward repetitive process of step S22.When coding controller 18 determines that processing finishes when step S27 stream finishes.
Like this, at unit interval B, the bit rate Rob of the stream beyond the video (=S-ROB) be retained, then remaining bit rate Rvb (=S-Rob) be set to the bit rate of video flowing.At unit interval C, deduct the Rvc that the bit rate Roc of the stream beyond the video obtains (=S-ROC), be set to the bit rate of video flowing.
Like this, handle in the example at this, video flowing is encoded with variable bit rate again, does not need filler thus, perhaps can reduce the amount of filler.Like this, can more effectively encode to video flowing.
Should be noted that by the input transport stream to have the situation of fixed bit rate, and the description above having made; Yet the present invention can be applied to import the situation that transport stream for example has variable bit rate as shown in figure 10.
Like this, can on recording medium 22,, write down the transport stream of longer content as required with lower bit rate.
And, can prevent that the quality of data beyond the video from significantly descending, as video data, rest image/letter and graph data and multimedia coding data.These segment datas beyond the video more are lower than video data substantially on capacity.Thus, reduce, influence video data in addition and more be far more than video data with the bit rate of data beyond the video of video data same ratio.The present invention can prevent such effect.
The reproduction of the source bag stream file of record on the recording medium 22 will be described below.Figure 11 is a structure chart, has shown the embodiment that uses reproducer of the present invention.Be recorded in the source bag stream file on the recording medium 22, read by reading unit 31.Reading unit 31 is the sub-information of the multimedia display of reading and recording on recording medium 22 also, and wherein the sub-information of multimedia display is as the file that separates with source bag stream file.
The source bag stream that is read by reading unit 31 outputs to mark separator 32 time of advent.The sub-information of multimedia display outputs to synthesizer 36.The time of advent, the mark separator 32 had built-in reference clock, and with the value of parameter clock and the time of advent mark value relatively, wherein the time of advent, mark joined in the source bag of input source bag stream.When two values become when being equal to each other, the time of advent mark separator 32 from comprise the source bag that arrives time mark, remove the mark time of advent with equal value, then the source bag is outputed to demultiplexer 33, as transport stream packets.
Demultiplexer 33 is separated into the transport stream of input the stream of video-audio stream, multimedia coding data and letter and figure/letter/rest image and other data.The video-audio stream of mask data outputs to AV decoder 34.The multimedia coding data output to synthesizer 36.The stream of letter and figure/letter/rest image and other data outputs to letter and figure/rest image decoder 35.
AV decoder 34 is separated into video data and voice data with the video-audio stream of input, with video data and voice data decoding, then voice data is outputed to unillustrated audio reproduction apparatus among the figure, and video data is outputed to synthesizer 36.Letter and figure/rest image decoder 35, with the letter of input and the stream decoding of figure, letter, rest image and other data, the letter that will decode and graph data, alphabet data, Still image data or the like output to synthesizer 36 then.
Synthesizer 36 is from AV decoder 34 receiving video datas, and the multimedia coding data of reception demultiplexer 33 outputs, the sub-information of multimedia display that the letter of letter and figure/rest image decoder 35 outputs and figure/letter/rest image and other data and reading unit 31 read.Synthesizer 36 is checked the mark that do not match (Fig. 4) of the sub-information of multimedia display of input, determines whether do not match between incoming video signal and the multimedia coding data.
When not matching between mark indication incoming video signal and the multimedia coding data when not matching, synthesizer 36 is according to the original level size and the original vertical size of the sub-information of multimedia display, change the yardstick of incoming video signal, make the frame reproduction of vision signal with reference dimension.Then, by other letter on video data and the multimedia plane is connected with graph data or the like, and the video data that obtains is output on the television receiver (not shown) or like device as display device, and wherein vision signal changes according to the yardstick of multimedia coding data.
On the other hand, the mark indication that do not match when the sub-information of multimedia display, when not matching between incoming video signal and the multimedia coding data, synthesizer 36 is connected incoming video signal with other data on the multimedia plane, is used for not changing the output of the yardstick of incoming video signal.
Like this, show sub-information by recording multimedia in recording operation, and use the sub-information of multimedia display in reproduction, the frame of transmission equipment side is presented at receiver side.With reference to figure 12A and 12B, even because the coding again of transmission equipment side (record side), frame of video is changed into the size littler than original video frame, by the change in the recording of video frame size, as multimedia display information, and in reproduction the sub-information of the multimedia display of reference record, can not obtained in receiver side (reproduction side), and between video and other data, do not match by the frame of encoding again and obtaining.
When the sub-information of multimedia display can be recorded on the recording medium 22, as with file that bag stream file in source separates the time, wherein bag stream file in source comprises letter and graph data and vision signal, as mentioned above, the sub-information of multimedia display can also be wrapped in the stream file in the embedding source, and is recorded on the recording medium 22.Figure 13 has shown the structure of tape deck 1, is used for implementing the sub-information of multimedia display at source bag stream file, is used for reappearing.
The structure of the tape deck 1 that shows from Figure 13 can be seen in the comparison of the tape deck 1 that shows with Fig. 1 significantly, and the sub-information of multimedia display from coding unit 20 outputs of the tape deck 1 of Figure 13 outputs to multiplexer 16.Multiplexer 16 is set up transmission package, then the sub-information embedding of the multimedia display source of input is wrapped in the stream file, and transport stream is outputed to mark adding time of advent device 17.Except stream file is wrapped as the transmission package in the sub-information embedding of multimedia display source, the sub-information of multimedia display can write the user data area of mpeg video stream.
Should be noted that in the present embodiment, to video data again Methods for Coding be not limited to the method for front; The video flowing of input can be transformed in the DCT district, and changes frame of video and other coding parameter.
Figure 14 has shown the structure of reproducer 30, and this device is used for the sub-information of multimedia display is embedded into source bag stream file, and records on the recording medium 22.The structure of the reproducer 30 that shows from Figure 14 can be seen in the comparison of the reproducer 30 that shows with Figure 11 significantly, and in the structure of the reproducer 30 of Figure 14,31 of reading units read source bag stream.Source bag stream by reading unit 31 reads is input to demultiplexer 33 by arriving time mark separator 32.
Demultiplexer 33 extracts the sub-information of multimedia display from the source bag stream file of input, then the sub-information of multimedia display is input to synthesizer 36.Other structure is identical with Figure 11.
Like this, also be included in the bag stream file of source in the sub-information of multimedia display, under the situation that is used to store, the frame of video size and the display position of transmission equipment side obtain at receiver side.
Should be noted that by the situation of transport stream and described present embodiment; Yet, the invention is not restricted to this.The present invention can be applicable to program stream and other multiplex stream.
Above-described poly-sequence of processing step not only can be carried out by hardware, and can be carried out by software.In this case, and personal computer formation tape deck 1 for example shown in Figure 15 (and also have reproducer 30, although do not draw in the drawings).
In Figure 15, CPU (central processing unit) 101 is according to the program that is stored among the ROM (read-only memory) 102, or from pack into the program of RAM (random asccess memory) 103 of memory cell 108, carries out various processing.RAM103 also stores CPU101 desired data or the like, forms various processing as required.
CPU101, ROM102 and RAM103 are connected to each other by bus 104.Equally, input/output interface 105 is connected on the bus 104.
Input/output interface 105 is connected with the input unit 106 that keyboard, mouse or the like form; Output unit 107 comprises demonstration and the loud speaker that CRT, LCD or similar parts form; Memory cell 108 is formed by hard disk or similar parts; And communication unit 109 is formed by MODEM, terminal adapter or the like.Communication unit 109 is carried out communication by network and is handled.
Input/output interface 105 also is connected on the driver 110 as required.Disk 121, CD 122, magneto optical disk 123 or semiconductor memory 124 insert driver 110 as required.Computer program from driver 110 is read is installed in the memory cell 108 as required.
When the sequence of treatment step is carried out by software, program recording medium is installed on the computer, and there, the program that forms software is attached in specialized hardware or the general purpose personal computer, wherein general purpose personal computer can be installed on it by for example various programs, carries out various functions.
The example of recording medium not only comprises the program record package media that is distributed to the user, coming with the computer branch provides program, as disk 121 (comprising floppy disk), CD 122 (comprising CD-ROM (compact discs-read-only memory) and DVD (digital versatile disc)), magneto optical disk 123 (comprising MD (Mini Disk)) or semiconductor memory 124, as shown in figure 15, and comprise hard disk, hard disk comprises ROM102 and stored program memory cell 108, and offers the user with the state that is attached in advance in the computer.
Should be noted that in this manual, describe the step that recording medium provides program, not only comprise the treatment step of carrying out with the time series of description order, and comprise parallel or independent that carry out and with the irrelevant treatment step of time series.
As mentioned above, be used for the apparatus and method of information processing according to the present invention, and the program on the recording medium, according to the bit rate of second stream and the bit rate of output multiplex stream, the control encoding condition is used for first-class coding again.Thus, can encode again to first-class, and the quality of second stream does not have big decline.
When using ad hoc fashion to describe embodiments of the invention, such description only is used for illustrative purposes, and should be appreciated that, can change in view of the above and change, and do not separate in principle of claims and the scope from behind.

Claims (12)

1. an information processor is used for the input multiplex stream is encoded again, and the output multiplex stream is provided, and comprising:
Separator is used for being separated into described input multiplex stream first-class and second stream, and wherein second stream is formed by the stream beyond first-class;
Setting device is used to be provided with the bit rate of described output multiplex stream;
Control device is used for according to the bit rate of described second stream and the bit rate of described output multiplex stream, and control adjustment is used for the described first-class encoding condition of coding again;
Code device is used under described encoding condition described first-class coding again; With
Multiplex machine is used for described first-class and described second stream of encoding again multiplexed.
2. according to the information processor of claim 1, wherein said control device by described output multiplex stream is set bit rate and the difference between the bit rate of described second stream, control described encoding condition, when encoding again to the bit rate of described first-class setting.
3. according to the information processor of claim 2, wherein said encoding condition comprises described first bit rate and frame of video when encoding at least again.
4. according to the information processor of claim 1, wherein said control device is also controlled described encoding condition according to described first stream information, wherein said first-class being included in the described input multiplex stream.
5. according to the information processor of claim 2, wherein said control device is controlled described encoding condition, and with fixing bit rate to described first-class coding again.
6. according to the information processor of claim 2, wherein said control device is controlled described encoding condition, and with variable bit rate to described first-class again the coding.
7. an information processing method is used for the input multiplex stream is encoded again, and the output multiplex stream is provided thus, comprises step:
Be separated into described input multiplex stream first-class and second stream, wherein second stream is formed by the stream beyond first-class;
The bit rate of described output multiplex stream is set;
According to the bit rate of described second stream and the bit rate of described output multiplex stream, control adjustment is used for the described first-class encoding condition of coding again;
Under described encoding condition to described first-class again the coding; And
Described first-class and described second stream of encoding again is multiplexed.
8. according to the information processing method of claim 7, the step of wherein said control adjustment by described output multiplex stream is set bit rate and the difference between the bit rate of described second stream, control described encoding condition, when encoding again to the bit rate of described first-class setting.
9. information processing method according to Claim 8, wherein said encoding condition comprises described first bit rate and frame of video when encoding at least again.
10. information processing method according to Claim 8, the step of wherein said control adjustment is also controlled described encoding condition according to described first stream information, wherein said first-class being included in the described input multiplex stream.
11. information processing method according to Claim 8, the step of wherein said control adjustment is controlled described encoding condition, and with fixing bit rate to described first-class coding again.
12. information processing method according to Claim 8, the step of wherein said control adjustment is controlled described encoding condition, and with variable bit rate to described first-class again the coding.
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MY128385A (en) 2007-01-31
KR100724206B1 (en) 2007-05-31
TW519841B (en) 2003-02-01
EP1162845A2 (en) 2001-12-12
JP4724919B2 (en) 2011-07-13
KR20010110167A (en) 2001-12-12
US20020015529A1 (en) 2002-02-07
CN1338870A (en) 2002-03-06

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